The Multifaceted Roles of Mitochondria in Osteoblasts: from Energy Production to Mitochondrial-Derived Vesicle Secretion.

Mitochondria in osteoblasts have been demonstrated to play multiple crucial functions in bone formation from intracellular ATP production to extracellular secretion of mitochondrial components. The present review explores the current knowledge about mitochondrial biology in osteoblasts, including mitochondrial biogenesis, bioenergetics, oxidative stress generation, and dynamic changes in morphology. Special attention is given to recent findings, including mitochondrial donut formation in osteoblasts, which actively generates mitochondrial-derived vesicles (MDVs), followed by extracellular secretion of small mitochondria and MDVs. We also discuss the therapeutic effects of targeting osteoblast mitochondria, highlighting their potential applications in improving bone health.